XML 98 R61.htm IDEA: XBRL DOCUMENT v3.8.0.1

Share Capital and Share Premium - Summary of Share Capital and Share Premium (Parenthetical) (Details) - £ / shares	Dec. 31, 2017	Sep. 14, 2017	Dec. 31, 2016	Dec. 31, 2015
Ordinary Shares
Disclosure Of Classes Of Share Capital [Line Items]
Par value per share	£ 0.04	£ 0.01	£ 0.01	£ 0.01
Founder Ordinary 1 Shares
Disclosure Of Classes Of Share Capital [Line Items]
Par value per share	0.01	0.01
Founder Ordinary 2 Shares
Disclosure Of Classes Of Share Capital [Line Items]
Par value per share	0.01	0.01
Series A Shares
Disclosure Of Classes Of Share Capital [Line Items]
Par value per share	0.01	0.01
Series B Shares
Disclosure Of Classes Of Share Capital [Line Items]
Par value per share	£ 0.001	£ 0.001

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfClassesOfShareCapitalLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The nominal value per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 79
-Subparagraph a
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_79_a_iii&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_ParValuePerShare
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ncna_FounderOrdinaryOneSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ncna_FounderOrdinaryTwoSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ncna_SeriesASharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ncna_SeriesBSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: